When are you required to use your headlights?

Answer: C — From sunset to sunrise or when visibility is poor.

Headlights are required to be used from sunset to sunrise or when visibility is poor, which includes conditions such as fog, heavy rain, or snow. This is crucial for safety, as headlights not only illuminate the road ahead for the driver but also make the vehicle more visible to other road users, reducing the risk of accidents in low-light or poor visibility conditions. Using headlights in these scenarios ensures that you can see clearly and that other drivers can see you, enhancing overall road safety. This requirement helps create a safer driving environment, especially during times when natural light is insufficient. The other scenarios provided, such as only using headlights at night or during specific weather conditions, do not encompass the full range of situations when they are necessary, missing important guidelines for safe driving.